
Chemistry: Atoms, Molecules, and Chemical Formulas Worksheet
Authored by Shamir Johnson
Science
7th Grade
NGSS covered
Used 2+ times

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25 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the smallest unit of an element that maintains its chemical properties?
A molecule
An atom
A compound
An electron
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following best describes a molecule?
A single atom of any element
Two or more atoms bonded together
A proton and neutron together
The nucleus of an atom
Tags
NGSS.MS-PS1-1
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The chemical formula H2O indicates that a water molecule contains:
One hydrogen atom and two oxygen atoms
Two hydrogen atoms and one oxygen atom
Two oxygen atoms and one hydrogen atom
One hydrogen atom and one oxygen atom
Tags
NGSS.MS-PS1-1
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does the subscript number in a chemical formula represent?
The atomic number of the element
The atomic mass of the element
The number of atoms of that element
The charge of the element
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is an example of an element?
Water (H2O)
Table salt (NaCl)
Gold (Au)
Carbon dioxide (CO2)
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the chemical formula CO2, what does the "2" indicate?
a. Two carbon atoms
b. Two molecules of carbon dioxide
c. Two oxygen atoms
d. The charge on the oxygen
Tags
NGSS.MS-PS1-1
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How can you identify the number of different elements in a chemical formula?
Count the total number of atoms
Count the different capital letters
Tags
NGSS.MS-PS1-1
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